Ye Xiao devoured the Blood Imprint and directly comprehended everything.
It turned out that the blood imprint contained a demonic cultivation technique known as Blood Fiend Ancient Body. It was a type of body cultivation technique and by cultivating this body cultivation technique the Blood Corpse was able to give birth to the four drops of Ancient Demon's Blood in his previous life.
This cultivation technique was really too evil. To cultivate this technique, one needs to gather constantly kill people and beasts, and absorb their blood essence. The more one kills, the more quickly one could cultivate.
Furthermore, there were three stages of the Blood Fiend Ancient Body. Every stage needs more blood to cultivate. Moreover, to cultivate the second stage, one not only has to absorb people's blood but also their souls.
The requirements to cultivate the third stage were even crueller and harsh.